| JARVIS-ID:JVASP-9656 | Functional:optB88-vdW | Primitive cell | Primitive cell | Conventional cell | Conventional cell |
| Chemical formula:YMn2O4 | Formation energy/atom (eV):-2.51 | a 5.692 Å | α:116.73 ° | a 5.692 Å | α:90.0 ° |
| Space-group :I4_1/a, 88 | Relaxed energy/atom (eV):-6.5078 | b 5.692 Å | β:116.73 ° | b 5.692 Å | β:90.0 ° |
| Calculation type:Bulk | SCF bandgap (eV):0.001 | c 6.327 Å | γ:89.999 ° | c 9.765 Å | γ:90.0 ° |
| Crystal system:tetragonal | Point group:4/m | Density (gcm-3):5.52 | Volume (Å3):158.17 | nAtoms_prim:14 | nAtoms_conv:28 |
Calculations are done using VASP software [Source-code]. Convergence on KPOINTS [Source-code] and ENCUT [Source-code] is done with respect to total energy of the system within 0.001 eV tolerance. Please note convergence on KPOINTS and ENCUT is generally done for target properties, but here we assume energy-convergence with 0.001 eV should be sufficient for other properties also. The points on the curves are obtained with single-point calculation (number of ionic steps, NSW=1 ). However, for very accurate calculations, NSW>1 might be needed.
The following shows the X-ray diffraction (XRD)[Source-code] pattern and the Radial distribution function (RDF) plots [Source-code]. XRD peaks should be comparable to experiments for bulk structures. Relative intensities may differ. For mono- and multi-layer structures , we take the z-dimension during DFT calculation for XRD calculations, which may differ from the experimental set-up.
The following shows the electronic density of states and bandstructure [Source-code]. DFT is generally predicted to underestimate bandgap of materials. Accurate band-gaps are obtained with higher level methods (with high computational requirement) such as HSE, GW , which are under progress. If available, MBJ data should be comparable to experiments also. Total DOS, Orbital DOS and Element dos [Source-code] buttons are provided for density of states options. Energy is rescaled to make Fermi-energy zero. In the bandstructure plot [Source-code], spin up is shown with blue lines while spin down are shown with red lines. Non-degenerate spin-up and spin-down states (if applicable) would imply a net orbital magnetic moment in the system. Fermi-occupation tolerance for bandgap calculation is chosen as 0.001.
High-symmetry kpoints based bandgap (eV): 0.04I
The following plot shows the plane averaged electrostatic potential (ionic+Hartree) along x, y and z-directions. The red line shows the Fermi-energy while the green line shows the maximum value of the electrostatic potential. For slab structures (with vacuum along z-direction), the difference in these two values can be used to calculate work-function of the material.
The orbital magnetic moment was obtained after SCF run. This is not a DFT+U calculation, hence the data could be used to predict zero or non-zero magnetic moment nature of the material only.
Total magnetic moment: 14.0001 μB
Magnetic moment per atom: 1.00000714286 μB
| Elements | s | p | d | tot |
| Y | 0.007 | 0.015 | 0.024 | 0.05 |
| Y | 0.007 | 0.015 | 0.024 | 0.05 |
| Mn | 0.031 | 0.025 | 3.195 | 3.251 |
| Mn | 0.034 | 0.023 | 3.197 | 3.254 |
| Mn | 0.032 | 0.025 | 3.197 | 3.253 |
| Mn | 0.033 | 0.024 | 3.195 | 3.251 |
| O | 0.001 | 0.032 | 0.0 | 0.033 |
| O | 0.001 | 0.048 | 0.0 | 0.049 |
| O | 0.001 | 0.032 | 0.0 | 0.033 |
| O | 0.001 | 0.048 | 0.0 | 0.049 |
| O | 0.0 | 0.039 | 0.0 | 0.04 |
| O | 0.001 | 0.041 | 0.0 | 0.042 |
| O | 0.001 | 0.041 | 0.0 | 0.042 |
| O | 0.0 | 0.039 | 0.0 | 0.04 |
Links to other databases or papers are provided below